EP2222218B1 - Dishwasher - Google Patents

Dishwasher Download PDF

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Publication number
EP2222218B1
EP2222218B1 EP08861686A EP08861686A EP2222218B1 EP 2222218 B1 EP2222218 B1 EP 2222218B1 EP 08861686 A EP08861686 A EP 08861686A EP 08861686 A EP08861686 A EP 08861686A EP 2222218 B1 EP2222218 B1 EP 2222218B1
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EP
European Patent Office
Prior art keywords
filter
dishwasher according
distributor
liquid
auxiliary filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08861686A
Other languages
German (de)
French (fr)
Other versions
EP2222218A1 (en
Inventor
Egbert Classen
Helmut Jerg
Hans-Peter Nannt
Kai Paintner
Thomas Wachinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL08861686T priority Critical patent/PL2222218T3/en
Publication of EP2222218A1 publication Critical patent/EP2222218A1/en
Application granted granted Critical
Publication of EP2222218B1 publication Critical patent/EP2222218B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4202—Water filter means or strainers

Definitions

  • the invention relates to a dishwasher according to the preamble of claim 1.
  • a filter system is used, which may include a coarse filter, a fine sieve and a micro sieve.
  • the coarse screen is used to retain dirt particles that can lead to a blockage of the drain pump.
  • a fine sieve particles with a particle size greater than approx. 1 mm are retained and with a micro sieve particles with a particle size greater than approx. 0.15 mm are retained.
  • a water-conducting household appliance such. a dishwashing machine has a drain pump, with which at the end of a wash cycle soiled wash liquor can be conveyed out of the dishwasher into a house-side wastewater disposal system.
  • lye pumps are designed so that they can promote larger particle sizes unhindered and there is no blockage of the drain pump. Therefore, lye pumps are arranged in such a way that polluted rinsing liquor is only roughly filtered during pumping.
  • a dishwasher has a circulation pump with which rinsing liquor can be circulated during a cleaning operation, ie, in the sump of a dishwasher collecting liquid is supplied by the circulation pump by a hydraulic system in the interior of the Spül organizations arranged spray arms, with which a uniform loading of the dishes with Rinsing carried out.
  • the spray arms have relatively small openings, so it is necessary to guide the circulated rinsing liquor through the fine and micro sieve, so that even the smallest particles are retained and the outlet openings of the spray arms can not clog.
  • the circulation pump is designed with respect to the particle size tolerance.
  • the spray arms of a dishwasher can be alternately charged with washing liquid alternately in time intervals predetermined by the washing program in alternating operation.
  • the flushing liquid can be applied to the items to be washed with a high kinetic energy despite the total amount of flushing liquid being reduced overall.
  • the spray can work in such a change operation.
  • the dishwasher has a switching element, upon actuation of which the rinsing liquid can be led to a first liquid line leading to the first spraying device and / or to a second liquid line leading to the second spraying device.
  • a sump for a dishwasher is specified in which a filter screen is arranged in front of the impeller of a pump. This impeller is followed by a Varioventil in the flow direction, by means of which alternately an upper and lower spray arm liquid is supplied.
  • the object of the invention is to provide a dishwasher with a switching element whose functionality is increased.
  • the switching element is associated with an additional filter.
  • the additional filter By assigning the additional filter to the switching element can be reduced by a filter in return provided in the range of the Spül electer Camills screen combination. This reduces the overall space required for the sieve combination so that the sump below the Spül conducteder convinceds is smaller dimensioned. With a correspondingly smaller sized pump pot, the amount of dead water contained therein and thus also the heating power required for heating the flushing liquid is reduced.
  • the switching element and the at least one additional filter are combined in one component, i. they are surrounded by a common housing, wherein both functionalities are combined in the one component.
  • the additional filter can be coupled with the switching element. Due to the resulting in switching movements of the switching element turbulence in The rinsing liquid flow can thus filter residues on the filter surface of the additional filter solve.
  • the additional filter can preferably be arranged on the pressure side of a circulation pump circulating the rinsing fluid.
  • the circulating pump is less prone to pressure fluctuations in the rinsing liquid flow on its pressure side, which may possibly be caused by filter residues on the additional filter.
  • the additional filter may be upstream of the switching element in the liquid flow direction, whereby contamination of the switching element is prevented.
  • the arranged together with the switching element additional filter is in contrast to the provided on the Spippo umaner Camill sieve combination difficult to access assembly technology.
  • the additional filter may therefore preferably be designed to be self-cleaning in order to avoid a time-consuming disassembly of the additional filter for its cleaning.
  • the self-cleaning of the additional filter can be assisted by means of a scraper, which scrapes off filter residues from the filter surface streamed by the rinsing liquid.
  • the scraper relative to the additional filter can be arranged stationary in a distributor housing, in which the switching element is provided.
  • the switching element may be a rotatably mounted distributor element with at least one control opening.
  • the distributor element preferably a distributor disk, may face a non-rotatable distributor wall with outlet openings for the first and second liquid lines leading respectively to the first and second spraying devices.
  • the control opening may overlay the first or the second outlet opening, whereby the rinsing liquid is accordingly conducted through the control opening and the respective outlet opening to the first or second liquid line.
  • the distributor wall may be a top wall of the distributor housing, while the associated distributor disk is rotatably mounted inside the housing on the top wall.
  • the additional filter can either be upstream of the control opening or arranged as a sieve insert within the control opening of the distributor disc.
  • the filter residues do not remain on the additional filter, but they can settle by gravity on the bottom wall of the distributor housing. From there, the settled filter residues can be led out of the distributor housing via a drain.
  • the side wall connecting the top wall and the bottom wall may have at least one inlet opening through which the rinsing liquid can be introduced into the distributor housing.
  • the scraper is arranged on a side of the distributor housing opposite the inlet opening, whereby settling of the filter residues on the bottom wall is not directly impaired.
  • the switching element can release the first liquid line in a first switching position and at the same time block the second liquid line. Conversely, in a second switching position, the switching element can block the first liquid line and release the second liquid line, whereby the alternating operation of the spraying devices already mentioned above takes place.
  • the filter combination at the Spül duringer founded have a coarse and a fine filter, which in comparison to the additional filter each have a larger mesh size.
  • the additional filter can be a microfilter with a smaller mesh size compared to the large and fine filters. Since the additional filter is located downstream of the coarse and fine filter in the flow direction, the additional filter is only flowed through by pre-clarified rinsing liquid, so that the additional filter is not prematurely added by coarse contaminated rinsing liquid.
  • the additional filter can be designed to be self-cleaning.
  • a self-cleaning filter may comprise at least one disk-shaped filter means sitting on a hollow cylindrical Filtratsammel effet. Rinsing fluid can be introduced into the filtrate collecting line through the filter medium.
  • the manifold may in turn be fluidly connected to the control port in the distributor element.
  • At least one annular space can be provided, which can be flowed through by the rinsing liquid in transverse flow.
  • a filter cake or filter residue located on the filter surface is removed, which can sediment on a container bottom.
  • an annular gap is provided between the disc-shaped filter means and the side wall of the distributor housing, via which the filter residues can settle on the bottom of the distributor housing.
  • the filter residues can be led out of the filter housing via a drain. The discharge can be connected to the sump, through which the filter residues can be discharged into the sewer system.
  • the distributor housing is designed as a hollow cylinder.
  • the rinsing liquid is thus preferably introduced tangentially along the inner side wall of the distributor housing and flows over the disc-shaped filter medium in a circular cross-flow.
  • the additional filter may have at least a first single filter and a second single filter, each with different mesh sizes.
  • the first or second single filter of the additional filter can be connected to the hydraulic circuit of the dishwasher by means of an electronic control device or decoupled from this.
  • the two individual filters are therefore not integrated over the entire rinse cycle in the hydraulic circuit, but only switchable at predetermined Spülzyklus sections.
  • the above-mentioned distributor disc or the distributor element can have at least one first control opening with associated first individual filter and a second control opening with associated second individual filter.
  • This embodiment is based on the idea that when the rinsing liquid is still roughly soiled, for example during the cleaning step, coarse filtration of the rinsing liquid through the individual filter of larger mesh size is already sufficient.
  • the single filter with a smaller mesh size in particular a microfilter, can be switched on, whereby a fine filtration takes place by means of which backwashing of the ware is reliably prevented.
  • the distributor disc with its first control port in which the single filter is provided with large mesh size, control the alternating operation of the spray.
  • the distributor disk can then control the alternating operation with its second control opening, in which the individual filter of smaller mesh size is provided.
  • the change of the mesh size of the additional filter is not effected by connecting a first or second single filter.
  • the additional filter according to a further embodiment, at least two stacked Sieblagen each having a predetermined mesh size.
  • the Sieblagen can be, for example, superimposed perforated plates whose through holes can be completely or partially superimposed on each other.
  • the two Sieblagen can be adjusted in their respective level against each other, which adjusts accordingly, the total mesh size of the additional filter.
  • at least one of the two screen layers of the additional filter can be adjusted by a control device via a transmission element.
  • the flow guidance of the rinsing liquid through the distributor housing can be designed such that in a self-cleaning mode, the rinsing liquid in a backwash removes the filter residues from the filter surface of the additional filter and leads via a discharge from the distributor housing.
  • the control opening with integrated additional filter in the self-cleaning mode can superimpose the inlet opening for the rinsing liquid.
  • the outlet openings to the first and second liquid lines and the inlet opening for the rinsing liquid can be arranged together in the distributor wall.
  • the associated rotary distributor element may superimpose the respective outlet openings of the first and second fluid lines during a liquid-immersion insert program step for alternating operation.
  • the distributor element can run over the two outlet openings with its control opening and overlay the inlet opening for the rinsing liquid.
  • FIG. 1 is roughly schematically shown a dishwasher with a washing container 1, in which a not shown items to be washed in dish racks 3, 5 can be arranged.
  • two spraying arms 7, 9 provided in different spraying levels are arranged by way of example as spraying devices, with which the washware to be cleaned is supplied with washing liquid.
  • Below the Spül electerteil a pump pot 11 with associated circulating pump 13 is provided, which via fluid lines 14, 15, 16 is fluidically connected to the spray arms 7, 9.
  • the sump 11 is also connected via connecting pieces with a, connected to the water supply network fresh water supply line 17 and a drain line 18 in conjunction, in which a drain pump 19 for pumping out contaminated rinsing liquid from the washing compartment 1 is arranged.
  • Fig. 1 Like from the Fig. 1 further shows, downstream of the circulating pump 13 in the liquid line 14, a manifold 21 through which the upper and lower spray arm 7, 9 can be acted upon with rinsing liquid in the alternating operation during the wash cycle of the dishwasher.
  • the distributor 21 has according to the Fig. 1 in addition to one, shown here as a switching valve switching element 22 an additional filter 23, which is upstream of the switching element 22.
  • the switching element 22 is switchable between two switching states. In the first, in the Fig. 1 shown switching state, the liquid line 15 is released to the lower spray arm 9 during the wash cycle, while the liquid line 16 is decoupled to the upper spray arm 7 from the hydraulic circuit. In the second switching state, in contrast, the liquid line 16 is released to the upper spray arm 7, while the liquid line 15 is decoupled from the hydraulic circuit.
  • the additional filter 23 upstream of the switching element 22 is part of a total of three-part filter system of the dishwasher, as shown in the Fig. 2 is shown.
  • the filter system also has a fine filter 24 and a coarse filter 25.
  • the fine filter 24 is designed as a surface sieve covering the sump 11, for example a perforated plate, which is aligned flush with the sump bottom.
  • the coarse filter 25 is provided as a conventional, removable cup-shaped coarse filter in the central region of the funnel-shaped fine filter 24.
  • the coarse filter 25 has the largest mesh size, while the fine filter 24 is designed with a smaller mesh size.
  • the additional filter 23 is in contrast a microfilter with the smallest mesh size.
  • the additional filter 23 is provided as a flat filter insert in the housing 26 of the distributor 21.
  • the distributor housing 26 is hollow cylindrical with a circumferential side wall 27 and a top wall 28 and an opposite funnel-shaped tapered bottom wall 29 is formed.
  • a liquid outlet with a discharge 30th connected In the central region of the funnel-shaped tapering bottom wall 29 is a liquid outlet with a discharge 30th connected.
  • the discharge 30 is fluidically connected to the pump pot 11 in connection.
  • connecting pieces are provided with outlet openings 31, 32 for the leading to the spray arms 7, 9 liquid lines 15, 16.
  • an inlet opening 33 is arranged in the cylindrical side wall 27, via which the liquid line 14 can feed rinsing liquid into the distributor interior.
  • the distributor interior is provided as a switching element 22 a rotatably mounted on the top wall 28 distributor plate 22.
  • the distributor disc 22 is located in the Fig. 2 by way of example in sliding contact with the top wall 28 and has a control opening 34. Depending on the rotational position of the distributor disk 22, the control opening 34 can superimpose either the first outlet opening 31 leading to the lower spray arm 9 or the second outlet opening 32 leading to the upper spray arm 7.
  • the distributor plate 22 is cup-shaped with a peripheral side edge, at the lower end of the additional filter 23 is attached.
  • the additional filter 23 is here a microsieve formed planar.
  • a scraper 38 is provided which is rotatably supported on the housing side wall 27 and protrudes into the distributor interior.
  • the scraper 38 is with its scraping edge in contact with the filter surface, which may be removed during a rotary actuation of the distributor disc 22, if necessary, filter residues from the filter surface.
  • the filter residues filtered out by the additional filter 23 accumulate in the middle region of the funnel-shaped bottom 29. From there, the filter residues can be conducted via the discharge line 30 out of the distributor housing 26, as will be described later.
  • the irrigation liquid inlet port 33 and the scraper 38 are positioned opposite to each other on the inner cylindrical inner wall 26. The settling of filter residues that are scraped off the scraper 38 and collect on the floor 29 is therefore not affected by the introduced rinsing liquid flow.
  • Fig. 3 a temporal program sequence with the individual partial program steps of a wash cycle of the dishwasher, namely the pre-wash V, cleaning R, intermediate rinsing Z, rinsing K and drying T.
  • the program flow is by means of one in the Fig. 1 shown control means 35 controlled.
  • the control device 35 is inter alia in signal communication with the circulating pump 13, the drain pump 19, the switching element 22 and a solenoid valve 36 which is arranged in the discharge line 30 from the distributor housing 26.
  • the program sequence is controlled by the electrical control device 35 in a conventional manner.
  • the control device 35 switches over the switching element 22 formed as a distributor disk at predetermined time intervals.
  • the two spray arms 7, 9 are therefore charged in individual operation with rinsing liquid.
  • the control device 42 sets the drain pump 19 in operation in order to guide the contaminated flushing liquid from the washing container 1 into the sewage system.
  • the control device 35 opens the solenoid valve 36, whereby the accumulated on the distributor housing bottom 29 filter residues are passed through the discharge line 30 and the pump pot 11 in the sewer system.
  • FIG. 4 the distributor housing 26 according to the second embodiment is shown alone.
  • the distributor housing 26 of the Fig. 4 is applicable in a dishwasher, as in the Fig. 1 is shown, to the description of which reference is made.
  • the additional filter 23 In contrast to the distributor 21 of the Fig. 1 and 2 is the additional filter 23 according to the Fig. 4 not designed as a planar microsieve, but has the additional filter 23 a number of disc-shaped filter means 37 which sit on a Filtratsammel effet 38.
  • the filter means 37 are fluidically connected to the cavity 39 of the filtrate manifold 38 in connection.
  • the filtrate manifold 38 protrudes coaxially with a center axis of the hollow cylindrical manifold housing 26 into the interior thereof.
  • the disc-shaped filter means 37 sit in the axial direction spaced from each other on the line 38th
  • annular spaces 40 are formed, which are flowed through by the rinsing liquid to be filtered in a circular cross-flow.
  • the inlet openings 33 for the rinsing liquid in Radial direction slightly protrude into the annular spaces 40.
  • the inlet openings 33 may be aligned in the tangential direction to the cylindrical side wall 27 of the distributor housing 26. The settling on the filter surfaces of the disc-shaped filter means 37 filter residues are therefore urged by centrifugal action to the cylindrical side wall 27 and can there along the cylindrical side wall 27 to the funnel-shaped housing bottom 29 drop.
  • the outer peripheral edges of the disc-shaped filter means 37 are spaced from the side wall 27 via an annular gap 41.
  • the filter residues collecting on the housing bottom 29 can be returned via the discharge line 30 to the pumping pot 11, from where they are conducted into the sewage system by means of the drainage pump 19.
  • a distributor disk 22 of a distributor 21 according to the third embodiment is shown.
  • the distributor 21 according to the third embodiment is also in the in the Fig. 1 Dishwasher shown applicable.
  • the distributor 21 also corresponds to the basic structure in the Fig. 2
  • the distributor 21 according to the third embodiment has the distributor housing 26 with the top wall 28, in which the two outlet openings 31, 32 connected to the liquid lines 15, 16 are provided.
  • Fig. 2 In contrast to Fig. 2 is not only a control port provided in the distributor housing 26 rotatably mounted distribution disc 22. Rather, the distributor disc 22 for each outlet opening 31, 32 on a control opening set consisting of two control ports 45, 46. In the two control ports 45, 46 of the control opening set each additional filter 23 are used, which have different mesh sizes.
  • the control opening 45 with the fine-meshed additional filter 23 is moved into the flow cross-section of the two outlet openings 31, 32.
  • the additional filters 23 are each sieve inserts which extend flush within the control openings 45, 46.
  • FIG. 6 is in one who Fig. 2 corresponding enlarged side view of the distributor 21 according to the fourth embodiment shown, the basic structure of the distributor 21 of the Fig. 2 so that in terms of its structure and its operation on the description of Fig. 2 can be used.
  • the additional filter 23 two superposed Sieblagen 48, 49, each with a predetermined mesh size, which are in sliding contact with each other.
  • the two screen layers 48, 49 are bordered in an only roughly indicated annular gear element 50.
  • the transmission element 50 can be controlled by means of the control device 35 such that the two screen layers 48, 49 can be adjusted relative to each other, whereby the overall mesh width of the additional filter 23 can be increased or reduced.
  • the screen layers 48, 49 may be perforated plates lying one on top of the other which, with their respective partial mesh width, gives the total adjustable mesh width of the additional filter 23.
  • FIGS. 7 and 8 a distributor 21 according to the fifth embodiment is shown in different operating states.
  • the Indian Fig. 7 shown distributor 21 is basically identical with respect to its operation and structure Distributor of Fig. 2 , In contrast to Fig. 2 If the irrigation fluid inlet opening 33 is not arranged in the side wall 27 of the distributor housing 26, it is located in the top wall 28, together with the two outlet openings 31, 32 to the liquid lines 15, 16. In the bottom area 29, the distributor housing 26 also has an outlet opening with a connected discharge line 30 through which filter residues from the filter housing 26 can be derived.
  • the additional filter 23 is arranged as a sieve insert within the control opening 34.
  • the distributor disc 22 is shown in a switching position provided with a fluid insert during a partial program step in which rinsing fluid is conducted from the circulating pump 13 via the inlet opening 33 and the passage opening 53 into the distributor housing interior and from there via the additional filter 23 through the outlet opening 31.
  • the passage opening 53 is dimensioned like a slot, so that even with a superimposition of the control opening 34 with the adjacent outlet opening 32, the rinsing liquid can flow through the passage opening 53 into the distributor housing interior.
  • the distributor 21 is shown in a self-cleaning mode.
  • the distribution disc 22 is brought into a rotational position in which the control port 34 superimposed on the inlet opening 33 for the rinsing liquid.
  • the circulation pump 13 Upon actuation of the circulation pump 13, the rinsing liquid can now flow through the additional filter 23 in a backwashing direction.
  • the control device 35 can both turn on the drain pump 19 and also open the solenoid valve 36 in the drain 30, whereby the filter residues can be conducted from the distributor housing into the sewage system.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A dishwasher comprising liquid lines that guide washing liquor towards spray devices arranged inside a washing receptacle. In an exemplary embodiment, the dishwasher includes a switch-over element, upon actuation of which, the washing liquor may be guided to a first liquid line leading to a first spray device, and/or to a second liquid line leading to a second spray device. The dishwasher may include at least one supplementary filter associated with the switch-over element.

Description

Die Erfindung betrifft eine Geschirrspülmaschine nach dem Oberbegriff des Patentanspruches 1.The invention relates to a dishwasher according to the preamble of claim 1.

Um bei wasserführenden Haushaltsgeräten, wie beispielsweise Geschirrspülmaschinen zu verhindern, dass das Leitungssystem, in dem Spülflotte umgewälzt wird, durch Schmutzpartikel verschmutzt wird, wird ein Filtersystem eingesetzt, das ein Grobsieb, ein Feinsieb und ein Mikrosieb umfassen kann. Dabei dient das Grobsieb dazu, Schmutzpartikel zurückzuhalten, die zu einer Blockade der Laugenpumpe führen können. Mit einem Feinsieb werden Partikel mit einer Partikelgröße größer ca. 1 mm und mit einem Mikrosieb werden Partikel mit einer Partikelgröße größer ca. 0,15 mm zurückgehalten.In order to prevent water in household appliances, such as dishwashers, that the conduit system is circulated in the wash liquor is polluted by dirt particles, a filter system is used, which may include a coarse filter, a fine sieve and a micro sieve. The coarse screen is used to retain dirt particles that can lead to a blockage of the drain pump. With a fine sieve, particles with a particle size greater than approx. 1 mm are retained and with a micro sieve particles with a particle size greater than approx. 0.15 mm are retained.

Ein wasserführendes Haushaltsgerät wie z.B. eine Geschirrspülmaschine weist eine Laugenpumpe auf, mit der am Ende eines Spülgangs verschmutzte Spülflotte aus dem Geschirrspüler heraus in ein hausseitiges Abwasserentsorgungssystem gefördert werden kann. Derartige Laugenpumpen sind derart ausgelegt, dass sie größere Partikelgrößen ungehindert fördern können und es zu keiner Blockade der Laugenpumpe kommt. Daher sind Laugenpumpen derart angeordnet, dass verschmutzte Spülflotte bei Abpumpen nur grob gefiltert wird.A water-conducting household appliance such. a dishwashing machine has a drain pump, with which at the end of a wash cycle soiled wash liquor can be conveyed out of the dishwasher into a house-side wastewater disposal system. Such lye pumps are designed so that they can promote larger particle sizes unhindered and there is no blockage of the drain pump. Therefore, lye pumps are arranged in such a way that polluted rinsing liquor is only roughly filtered during pumping.

Ferner weist eine Geschirrspülmaschine eine Umwälzpumpe auf, mit der während eines Reinigungsvorgangs Spülflotte umgewälzt werden kann, d.h., sich im Pumpensumpf einer Geschirrspülmaschine sammelnde Flüssigkeit wird mittels der Umwälzpumpe durch ein Hydrauliksystem im Inneren des Spülbehälters angeordneten Sprüharmen zugeführt, mit denen eine gleichmäßige Beaufschlagung des Spülguts mit Spülflotte erfolgt. Die Sprüharme weisen verhältnismäßig kleine Öffnungen auf, sodass es erforderlich ist, die umgewälzte Spülflotte durch das Fein- und Mikrosieb zu führen, damit auch kleinste Partikel zurückgehalten werden und die Austrittsöffnungen der Sprüharme nicht verstopfen können. Entsprechend ist die Umwälzpumpe bezüglich der Partikelgrößentoleranz ausgebildet.Furthermore, a dishwasher has a circulation pump with which rinsing liquor can be circulated during a cleaning operation, ie, in the sump of a dishwasher collecting liquid is supplied by the circulation pump by a hydraulic system in the interior of the Spülbehälters arranged spray arms, with which a uniform loading of the dishes with Rinsing carried out. The spray arms have relatively small openings, so it is necessary to guide the circulated rinsing liquor through the fine and micro sieve, so that even the smallest particles are retained and the outlet openings of the spray arms can not clog. Accordingly, the circulation pump is designed with respect to the particle size tolerance.

Die Sprüharme einer Geschirrspülmaschine können während eines Spülganges abwechselnd nacheinander in, vom Spülprogramm vorgegebenen Zeitintervallen im Wechselbetrieb mit Spülflüssigkeit beschickt werden. Auf diese Weise kann trotz insgesamt reduzierter Spülflüssigkeitsmenge die Spülflüssigkeit mit hoher kinetischer Energie auf das Spülgut aufgebracht werden.During a wash cycle, the spray arms of a dishwasher can be alternately charged with washing liquid alternately in time intervals predetermined by the washing program in alternating operation. In this way, the flushing liquid can be applied to the items to be washed with a high kinetic energy despite the total amount of flushing liquid being reduced overall.

Aus der DE 24 28 991 A1 ist eine gattungsgemäße Geschirrspülmaschine bekannt, deren Sprüheinrichtungen in einem solchen Wechselbetrieb arbeiten können. Hierzu weist die Geschirrspülmaschine ein Umschaltelement auf, bei dessen Betätigung die Spülflüssigkeit zu einer, zur ersten Sprüheinrichtung führenden ersten Flüssigkeitsleitung und/oder zu einer, zur zweiten Sprüheinrichtung führenden zweiten Flüssigkeitsleitung führbar ist.From the DE 24 28 991 A1 a generic dishwasher is known, the spray can work in such a change operation. For this purpose, the dishwasher has a switching element, upon actuation of which the rinsing liquid can be led to a first liquid line leading to the first spraying device and / or to a second liquid line leading to the second spraying device.

Bei der WO 2006/062305 ist ein Sumpf für eine Geschirrspülmaschine angegeben, in dem vor dem Flügelrad einer Pumpe ein Filtersieb angeordnet ist. Diesem Flügelrad ist in Strömungsrichtung ein Varioventil nachgeordnet, mittels dem abwechselnd einem oberen und unteren Sprüharm Flüssigkeit zuführbar ist.In the WO 2006/062305 a sump for a dishwasher is specified in which a filter screen is arranged in front of the impeller of a pump. This impeller is followed by a Varioventil in the flow direction, by means of which alternately an upper and lower spray arm liquid is supplied.

Die Aufgabe der Erfindung besteht darin, eine Geschirrspülmaschine mit einem Umschaltelement bereitzustellen, dessen Funktionalität erhöht ist.The object of the invention is to provide a dishwasher with a switching element whose functionality is increased.

Die Aufgabe der Erfindung ist durch die Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen offenbart.The object of the invention is solved by the features of claim 1. Advantageous developments of the invention are disclosed in the subclaims.

Gemäß dem kennzeichnenden Teil des Patentanspruches 1 ist dem Umschaltelement ein Zusatzfilter zugeordnet. Durch die Zuordnung des Zusatzfilters zum Umschaltelement kann im Gegenzug die im Bereich des Spülbehälterbodens vorgesehene Siebkombination um einen Filter reduziert werden. Damit reduziert sich der insgesamt für die Siebkombination erforderliche Bauraum, so dass der Pumpentopf unterhalb des Spülbehälterbodens kleiner dimensionierbar ist. Mit einem entsprechend kleiner dimensionierten Pumpentopf wird die darin befindliche Totwassermenge und somit auch die zur Erwärmung der Spülflüssigkeit erforderliche Heizleistung reduziert.According to the characterizing part of claim 1, the switching element is associated with an additional filter. By assigning the additional filter to the switching element can be reduced by a filter in return provided in the range of the Spülbehälterbodens screen combination. This reduces the overall space required for the sieve combination so that the sump below the Spülbehälterbodens is smaller dimensioned. With a correspondingly smaller sized pump pot, the amount of dead water contained therein and thus also the heating power required for heating the flushing liquid is reduced.

Dabei ist vorzugweise vorgesehen, dass das Umschaltelement und das zumindest eine Zusatzfilter in einem Bauteil zusammengefasst sind, d.h. sie sind von einem gemeinsamen Gehäuse umgeben, wobei beide Funktionalitäten in dem einem Bauteil vereint sind.It is preferably provided that the switching element and the at least one additional filter are combined in one component, i. they are surrounded by a common housing, wherein both functionalities are combined in the one component.

Bevorzugt kann der Zusatzfilter mit dem Umschaltelement bewegungsgekoppelt sein. Durch die bei Schaltbewegungen des Umschaltelements entstehenden Turbulenzen in dem Spülflüssigkeitsstrom können sich somit Filterrückstände auf der Filteroberfläche des Zusatzfilters lösen.Preferably, the additional filter can be coupled with the switching element. Due to the resulting in switching movements of the switching element turbulence in The rinsing liquid flow can thus filter residues on the filter surface of the additional filter solve.

Der Zusatzfilter kann bevorzugt an der Druckseite einer, die Spülflüssigkeit umwälzenden Umwälzpumpe angeordnet sein. Die Umwälzpumpe ist an ihrer Druckseite weniger stark anfällig für Druckschwankungen in der Spülflüssigkeitsströmung, die gegebenenfalls durch Filterrückstände am Zusatzfilter hervorgerufen werden können. Außerdem kann der Zusatzfilter dem Umschaltelement in Flüssigkeitsströmungsrichtung vorgelagert sein, wodurch eine Verunreinigung des Umschaltelements verhindert ist.The additional filter can preferably be arranged on the pressure side of a circulation pump circulating the rinsing fluid. The circulating pump is less prone to pressure fluctuations in the rinsing liquid flow on its pressure side, which may possibly be caused by filter residues on the additional filter. In addition, the additional filter may be upstream of the switching element in the liquid flow direction, whereby contamination of the switching element is prevented.

Der zusammen mit dem Umschaltelement angeordnete Zusatzfilter ist im Gegensatz zur am Spülbehälterboden vorgesehenen Siebkombination montagetechnisch schwierig zugänglich. Der Zusatzfilter kann daher bevorzugt selbstreinigend ausgebildet sein, um eine zeitaufwändige Demontage des Zusatzfilters für dessen Reinigung zu vermeiden. Die Selbstreinigung des Zusatzfilters kann mittels eines Abschabers unterstützt werden, der Filterrückstände von der, von der Spülflüssigkeit angeströmten Filteroberfläche abstreift. Für eine Relativbewegung zwischen dem Abschaber und dem Zusatzfilter kann der Abschaber gegenüber dem Zusatzfilter ortsfest in einem Verteilergehäuse angeordnet sein, in dem auch das Umschaltelement vorgesehen ist.The arranged together with the switching element additional filter is in contrast to the provided on the Spülbehälterboden sieve combination difficult to access assembly technology. The additional filter may therefore preferably be designed to be self-cleaning in order to avoid a time-consuming disassembly of the additional filter for its cleaning. The self-cleaning of the additional filter can be assisted by means of a scraper, which scrapes off filter residues from the filter surface streamed by the rinsing liquid. For a relative movement between the scraper and the additional filter, the scraper relative to the additional filter can be arranged stationary in a distributor housing, in which the switching element is provided.

Zur technischen Realisierung kann das Umschaltelement ein drehbar gelagertes Verteilerelement mit zumindest einer Steueröffnung sein. Das Verteilerelement, vorzugsweise eine Verteilerscheibe, kann einer drehfesten Verteilerwand mit Auslassöffnungen zur ersten und zweiten Flüssigkeitsleitung gegenüberliegen, die jeweils zur ersten bzw. zweiten Sprüheinrichtung führen. Bei Drehbetätigung der Verteilerscheibe kann die Steueröffnung die erste oder die zweite Auslassöffnung überlagern, wodurch entsprechend die Spülflüssigkeit durch die Steueröffnung sowie der jeweiligen Auslassöffnung zur ersten oder zweiten Flüssigkeitsleitung geleitet wird.For technical realization, the switching element may be a rotatably mounted distributor element with at least one control opening. The distributor element, preferably a distributor disk, may face a non-rotatable distributor wall with outlet openings for the first and second liquid lines leading respectively to the first and second spraying devices. During rotary actuation of the distributor disk, the control opening may overlay the first or the second outlet opening, whereby the rinsing liquid is accordingly conducted through the control opening and the respective outlet opening to the first or second liquid line.

Bevorzugt kann die Verteilerwand eine Deckwand des Verteilergehäuses sein, während die zugeordnete Verteilerscheibe gehäuseinnenseitig an der Deckwand drehbar gelagert ist. Der Zusatzfilter kann entweder der Steueröffnung vorgelagert oder als ein Siebeinsatz innerhalb der Steueröffnung der Verteilerscheibe angeordnet sein.Preferably, the distributor wall may be a top wall of the distributor housing, while the associated distributor disk is rotatably mounted inside the housing on the top wall. The additional filter can either be upstream of the control opening or arranged as a sieve insert within the control opening of the distributor disc.

Bei einer solchen deckwandseitigen Anordnung der Verteilerscheibe verbleiben die Filterrückstände nicht am Zusatzfilter, sondern können sich diese durch Schwerkraftwirkung auf der Bodenwand des Verteilergehäuses absetzen. Von dort können die abgesetzten Filterrückstände über eine Ableitung aus dem Verteilergehäuse geführt werden.In such a cover-wall-side arrangement of the distributor disc, the filter residues do not remain on the additional filter, but they can settle by gravity on the bottom wall of the distributor housing. From there, the settled filter residues can be led out of the distributor housing via a drain.

Die die Deckwand und die Bodenwand verbindende Seitenwand kann zumindest eine Einlassöffnung aufweisen, durch die die Spülflüssigkeit in das Verteilergehäuse eingeleitet werden kann. Strömungstechnisch günstig ist es, wenn der Abschaber an einer, der Einlassöffnung gegenüberliegenden Seite des Verteilergehäuses angeordnet ist, wodurch ein Absetzen der Filterrückstände auf der Bodenwand nicht unmittelbar beeinträchtigt wird.The side wall connecting the top wall and the bottom wall may have at least one inlet opening through which the rinsing liquid can be introduced into the distributor housing. In terms of flow technology, it is favorable if the scraper is arranged on a side of the distributor housing opposite the inlet opening, whereby settling of the filter residues on the bottom wall is not directly impaired.

Das Umschaltelement kann in einer ersten Schaltstellung die erste Flüssigkeitsleitung freigeben und gleichzeitig die zweite Flüssigkeitsleitung sperren. Umgekehrt kann das Umschaltelement in einer zweiten Schaltstellung die erste Flüssigkeitsleitung sperren und die zweite Flüssigkeitsleitung freigeben, wodurch der bereits oben erwähnte Wechselbetrieb der Sprüheinrichtungen erfolgt.The switching element can release the first liquid line in a first switching position and at the same time block the second liquid line. Conversely, in a second switching position, the switching element can block the first liquid line and release the second liquid line, whereby the alternating operation of the spraying devices already mentioned above takes place.

Bevorzugt kann die Filterkombination am Spülbehälterboden einen Grob- und einen Feinfilter aufweisen, die im Vergleich zum Zusatzfilter eine jeweils größere Maschenweite haben. Demgegenüber kann der Zusatzfilter ein Mikrofilter mit im Vergleich zum Groß- und Feinfilter geringerer Maschenweite sein. Da der Zusatzfilter in Strömungsrichtung stromab vom Grob- und Feinfilter liegt, wird der Zusatzfilter lediglich durch vorgeklärte Spülflüssigkeit durchströmt, so dass der Zusatzfilter nicht durch grob verschmutzte Spülflüssigkeit frühzeitig zugesetzt wird.Preferably, the filter combination at the Spülbehälterboden have a coarse and a fine filter, which in comparison to the additional filter each have a larger mesh size. In contrast, the additional filter can be a microfilter with a smaller mesh size compared to the large and fine filters. Since the additional filter is located downstream of the coarse and fine filter in the flow direction, the additional filter is only flowed through by pre-clarified rinsing liquid, so that the additional filter is not prematurely added by coarse contaminated rinsing liquid.

Bevorzugt kann der Zusatzfilter selbstreinigend gestaltet sein. Ein derart selbstreinigender Filter kann zumindest ein scheibenförmiges Filtermittel aufweisen, das auf einer hohlzylindrischen Filtratsammelleitung sitzt. Durch das Filtermittel kann Spülflüssigkeit in die Filtratsammelleitung eingeleitet werden. Die Sammelleitung kann wiederum strömungstechnisch mit der Steueröffnung in dem Verteilerelement verbunden sein.Preferably, the additional filter can be designed to be self-cleaning. Such a self-cleaning filter may comprise at least one disk-shaped filter means sitting on a hollow cylindrical Filtratsammelleitung. Rinsing fluid can be introduced into the filtrate collecting line through the filter medium. The manifold may in turn be fluidly connected to the control port in the distributor element.

Zwischen den scheibenförmigen Filtermitteln und/oder den Gehäusewänden kann zumindest ein Ringraum vorgesehen sein, der von der Spülflüssigkeit in Querströmung durchströmbar ist. Beim Überströmen der Filteroberfläche der scheibenförmigen Filtermittel wird ein auf der Filteroberfläche befindlicher Filterkuchen bzw. Filterrückstände abgetragen, die auf einem Behälterboden sedimentieren können. Hierzu ist zwischen dem scheibenförmigen Filtermittel und der Seitenwand des Verteilergehäuses ein Ringspalt vorgesehen, über den die Filterrückstände sich auf dem Boden des Verteilergehäuses absetzen können. Ausgehend vom Behälterboden können die Filterrückstände über eine Ableitung aus dem Filtergehäuse geführt werden. Die Ableitung kann mit dem Pumpentopf verbunden sein, über den die Filterrückstände in das Abwassersystem abgeführt werden können.Between the disk-shaped filter means and / or the housing walls, at least one annular space can be provided, which can be flowed through by the rinsing liquid in transverse flow. When overflowing the filter surface of the disc-shaped filter media a filter cake or filter residue located on the filter surface is removed, which can sediment on a container bottom. For this purpose, an annular gap is provided between the disc-shaped filter means and the side wall of the distributor housing, via which the filter residues can settle on the bottom of the distributor housing. Starting from the tank bottom, the filter residues can be led out of the filter housing via a drain. The discharge can be connected to the sump, through which the filter residues can be discharged into the sewer system.

Um eine kreisförmige Strömungsbewegung der in das Verteilergehäuse eingeleiteten Spülflüssigkeit zu unterstützen, ist das Verteilergehäuse hohlzylindrisch ausgeführt. Die Spülflüssigkeit wird somit bevorzugt tangential entlang der inneren Seitenwandung des Verteilergehäuses eingeleitet und überströmt in kreisförmiger Querströmung das scheibenförmige Filtermittel.In order to support a circular flow movement of the introduced into the distributor housing flushing liquid, the distributor housing is designed as a hollow cylinder. The rinsing liquid is thus preferably introduced tangentially along the inner side wall of the distributor housing and flows over the disc-shaped filter medium in a circular cross-flow.

In einer weiteren Ausführungsform kann der Zusatzfilter zumindest einen ersten Einzelfilter und einen zweiten Einzelfilter mit jeweils unterschiedlichen Maschenweiten aufweisen. Der erste bzw. zweite Einzelfilter des Zusatzfilters kann mittels einer elektronischen Steuereinrichtung dem Hydraulikkreislauf der Geschirrspülmaschine zugeschaltet oder von diesem entkoppelt werden. Die beiden Einzelfilter sind daher nicht über den ganzen Spülzyklus im Hydraulikkreislauf eingebunden, sondern lediglich bei vorgegebenen Spülzyklus-Abschnitten zuschaltbar.In a further embodiment, the additional filter may have at least a first single filter and a second single filter, each with different mesh sizes. The first or second single filter of the additional filter can be connected to the hydraulic circuit of the dishwasher by means of an electronic control device or decoupled from this. The two individual filters are therefore not integrated over the entire rinse cycle in the hydraulic circuit, but only switchable at predetermined Spülzyklus sections.

Für eine einfache Zuschaltung der Einzelfilter in den Hydraulikkreislauf bzw. deren Entkopplung kann die oben genannte Verteilerscheibe bzw. das Verteilerelement zumindest eine erste Steueröffnung mit zugeordnetem ersten Einzelfilter und eine zweite Steueröffnung mit zugeordnetem zweiten Einzelfilter aufweisen.For a simple connection of the individual filters in the hydraulic circuit or their decoupling, the above-mentioned distributor disc or the distributor element can have at least one first control opening with associated first individual filter and a second control opening with associated second individual filter.

Dieser Ausführungsform liegt die Idee zu Grunde, dass bei noch grob verschmutzter Spülflüssigkeit, etwa während des Reinigungsschrittes, eine Grobfiltration der Spülflüssigkeit durch den Einzelfilter größerer Maschenweite bereits ausreichend ist. Demgegenüber kann im darauffolgenden Zwischenspül- bzw. Klarspülschritt der Einzelfilter mit geringerer Maschenweite, insbesondere ein Mikrofilter, zugeschaltet werden, wodurch eine Feinfiltration erfolgt, mittels der eine Rückanschmutzung des Spülgutes sicher verhindert ist. Demzufolge kann erfindungsgemäß im Reinigungsschritt die Verteilerscheibe mit ihrer ersten Steueröffnung, in der der Einzelfilter großer Maschenweite vorgesehen ist, den Wechselbetrieb der Sprüheinrichtungen steuern. Im darauffolgenden Zwischenspül- oder Klarspülschritt kann dann die Verteilerscheibe mit ihrer zweiten Steueröffnung, in der der Einzelfilter geringerer Maschenweite vorgesehen ist, den Wechselbetrieb steuern.This embodiment is based on the idea that when the rinsing liquid is still roughly soiled, for example during the cleaning step, coarse filtration of the rinsing liquid through the individual filter of larger mesh size is already sufficient. In contrast, in the subsequent intermediate rinsing or rinsing step, the single filter with a smaller mesh size, in particular a microfilter, can be switched on, whereby a fine filtration takes place by means of which backwashing of the ware is reliably prevented. As a result, can according to the invention in the cleaning step, the distributor disc with its first control port, in which the single filter is provided with large mesh size, control the alternating operation of the spray. In the subsequent intermediate rinsing or rinsing step, the distributor disk can then control the alternating operation with its second control opening, in which the individual filter of smaller mesh size is provided.

In einer weiteren Ausführungsform erfolgt die Änderung der Maschenweite des Zusatzfilters nicht durch Zuschaltung eines ersten oder zweiten Einzelfilters. Vielmehr kann der Zusatzfilter gemäß einer weiteren Ausführungsform zumindest zwei übereinander angeordnete Sieblagen mit jeweils vorgegebener Maschenweite aufweisen. Die Sieblagen können beispielsweise übereinander liegende Lochbleche sein, deren Durchgangslöcher vollständig oder teilweise einander überlagern werden können.In a further embodiment, the change of the mesh size of the additional filter is not effected by connecting a first or second single filter. Rather, the additional filter according to a further embodiment, at least two stacked Sieblagen each having a predetermined mesh size. The Sieblagen can be, for example, superimposed perforated plates whose through holes can be completely or partially superimposed on each other.

Zur Einstellung der Gesamt-Maschenweite des Zusatzfilters können die beiden Sieblagen in ihrer jeweiligen Ebene jeweils gegeneinander verstellt werden, wodurch sich entsprechend auch die Gesamt-Maschenweite des Zusatzfilters einstellt. Für eine solche Maschenweiten-Einstellung kann zumindest eine der beiden Sieblagen des Zusatzfilters über ein Getriebeelement von einer Steuereinrichtung verstellt werden.To set the overall mesh size of the additional filter, the two Sieblagen can be adjusted in their respective level against each other, which adjusts accordingly, the total mesh size of the additional filter. For such a mesh width adjustment, at least one of the two screen layers of the additional filter can be adjusted by a control device via a transmission element.

In einer weiteren Ausführungsform kann die Strömungsführung der Spülflüssigkeit durch das Verteilergehäuse so gestaltet sein, dass in einer Selbstreinigungsbetriebsart die Spülflüssigkeit in einer Rückspülung die Filterrückstände von der Filteroberfläche des Zusatzfilters entfernt und über eine Ableitung aus dem Verteilergehäuse führt. Hierzu kann die Steueröffnung mit integriertem Zusatzfilter in der Selbstreinigungsbetriebsart die Einlassöffnung für die Spülflüssigkeit überlagern. Beim Einleiten der Spülflüssigkeit von der Umwälzpumpe in das Verteilergehäuse erfolgt somit ein Rückspülen des Zusatzfilters. Die Rückspülströmung kann zusammen mit den Filterrückständen über die Ableitung aus dem Verteilergehäuse geleitet werden.In a further embodiment, the flow guidance of the rinsing liquid through the distributor housing can be designed such that in a self-cleaning mode, the rinsing liquid in a backwash removes the filter residues from the filter surface of the additional filter and leads via a discharge from the distributor housing. For this purpose, the control opening with integrated additional filter in the self-cleaning mode can superimpose the inlet opening for the rinsing liquid. When the rinsing liquid is introduced from the circulating pump into the distributor housing, the additional filter is backwashed. The backwash flow can be routed out of the distributor housing via the drain with the filter residues.

Bevorzugt können die Auslassöffnungen zu den ersten und zweiten Flüssigkeitsleitungen sowie die Einlassöffnung für die Spülflüssigkeit gemeinsam in der Verteilerwand angeordnet sein. Demgegenüber kann das zugeordnete drehbare Verteilerelement während eines Teilprogrammschrittes mit Flüssigkeitseinsatz für einen Wechselbetrieb die jeweiligen Auslassöffnungen der ersten und zweiten Flüssigkeitsleitungen überlagern. Im Selbstreinigungsbetrieb kann das Verteilerelement mit seiner Steueröffnung die beiden Auslassöffnungen überfahren und die Einlassöffnung für die Spülflüssigkeit überlagern.Preferably, the outlet openings to the first and second liquid lines and the inlet opening for the rinsing liquid can be arranged together in the distributor wall. In contrast, the associated rotary distributor element may superimpose the respective outlet openings of the first and second fluid lines during a liquid-immersion insert program step for alternating operation. In self-cleaning mode the distributor element can run over the two outlet openings with its control opening and overlay the inlet opening for the rinsing liquid.

Nachfolgend sind fünf Ausführungsbeispiele der Erfindung anhand der beigefügten Figuren gezeigt.Below, five embodiments of the invention with reference to the accompanying figures are shown.

Es zeigen:

Fig. 1
in einem schematischen Blockdiagramm eine erfindungsgemäße Geschirr- spülmaschine gemäß dem ersten Ausführungsbeispiel;
Fig. 2
teilweise einen Hydraulikkreislauf der Geschirrspülmaschine mit zugeordnet- em Verteilergehäuse;
Fig. 3
ein, die Teilprogrammschritte während eines Spülgangs der Geschirrspül- maschine veranschaulichendes Temperatur-Zeit-Profil;
Fig. 4
einen Verteiler gemäß dem zweiten Ausführungsbeispiel in Alleinstellung;
Fig. 5
einen Verteiler gemäß dem dritten Ausführungsbeispiel in einer Ansicht von oben;
Fig. 6
in einer, der Fig. 2 entsprechenden Ansicht einen Verteiler gemäß dem vierten Ausführungsbeispiel; und
Fig. 7 und 8
ein Verteilergehäuse gemäß dem fünften Ausführungsbeispiel in jeweils unterschiedlichen Betriebszuständen.
Show it:
Fig. 1
in a schematic block diagram of a dishwasher according to the invention according to the first embodiment;
Fig. 2
partly a hydraulic circuit of the dishwasher with assigned distributor housing;
Fig. 3
a temperature-time profile illustrating the part program steps during a wash cycle of the dishwashing machine;
Fig. 4
a distributor according to the second embodiment in isolation;
Fig. 5
a distributor according to the third embodiment in a view from above;
Fig. 6
in one, the Fig. 2 corresponding view of a distributor according to the fourth embodiment; and
FIGS. 7 and 8
a distributor housing according to the fifth embodiment in each case different operating conditions.

In der Fig. 1 ist grob schematisch eine Geschirrspülmaschine mit einem Spülbehälter 1 gezeigt, in dem ein nicht dargestelltes Spülgut in Geschirrkörben 3, 5 angeordnet werden kann. Im gezeigten Spülbehälter 1 sind beispielhaft als Sprüheinrichtungen zwei in unterschiedlichen Sprühebenen vorgesehene Sprüharme 7, 9 angeordnet, mit denen das zu reinigende Spülgut mit Spülflüssigkeit beaufschlagt wird. Unter dem Spülbehälterboden ist ein Pumpentopf 11 mit zugeordneter Umwälzpumpe 13 vorgesehen, die über Flüssigkeitsleitungen 14, 15, 16 strömungstechnisch mit den Sprüharmen 7, 9 verbunden ist. Der Pumpentopf 11 ist außerdem über Anschlussstutzen mit einer, mit dem Wasserversorgungsnetz gekoppelten Frischwasserzuleitung 17 sowie einer Ablaufleitung 18 in Verbindung, in der eine Laugenpumpe 19 zum Abpumpen verunreinigter Spülflüssigkeit aus dem Spülbehälter 1 angeordnet ist.In the Fig. 1 is roughly schematically shown a dishwasher with a washing container 1, in which a not shown items to be washed in dish racks 3, 5 can be arranged. In the washing container 1 shown, two spraying arms 7, 9 provided in different spraying levels are arranged by way of example as spraying devices, with which the washware to be cleaned is supplied with washing liquid. Below the Spülbehälterboden a pump pot 11 with associated circulating pump 13 is provided, which via fluid lines 14, 15, 16 is fluidically connected to the spray arms 7, 9. The sump 11 is also connected via connecting pieces with a, connected to the water supply network fresh water supply line 17 and a drain line 18 in conjunction, in which a drain pump 19 for pumping out contaminated rinsing liquid from the washing compartment 1 is arranged.

Wie aus der Fig. 1 weiter hervorgeht, befindet sich stromab der Umwälzpumpe 13 in der Flüssigkeitsleitung 14 ein Verteiler 21, über den während des Spülgangs der Geschirrspülmaschine der obere und untere Sprüharm 7, 9 im Wechselbetrieb mit Spülflüssigkeit beaufschlagbar ist. Der Verteiler 21 weist gemäß der Fig. 1 neben einem, hier als Schaltventil dargestellten Umschaltelement 22 einen Zusatzfilter 23 auf, der dem Umschaltelement 22 vorgelagert ist. Das Umschaltelement 22 ist zwischen zwei Schaltzuständen umschaltbar. Im ersten, in der Fig. 1 gezeigten Schaltzustand ist während des Spülgangs die Flüssigkeitsleitung 15 zum unteren Sprüharm 9 freigeschaltet, während die Flüssigkeitsleitung 16 zum oberen Sprüharm 7 vom Hydraulikkreislauf entkoppelt ist. Im zweiten Schaltzustand ist demgegenüber die Flüssigkeitsleitung 16 zum oberen Sprüharm 7 freigeschaltet, während die Flüssigkeitsleitung 15 vom Hydraulikkreislauf entkoppelt ist.Like from the Fig. 1 further shows, downstream of the circulating pump 13 in the liquid line 14, a manifold 21 through which the upper and lower spray arm 7, 9 can be acted upon with rinsing liquid in the alternating operation during the wash cycle of the dishwasher. The distributor 21 has according to the Fig. 1 in addition to one, shown here as a switching valve switching element 22 an additional filter 23, which is upstream of the switching element 22. The switching element 22 is switchable between two switching states. In the first, in the Fig. 1 shown switching state, the liquid line 15 is released to the lower spray arm 9 during the wash cycle, while the liquid line 16 is decoupled to the upper spray arm 7 from the hydraulic circuit. In the second switching state, in contrast, the liquid line 16 is released to the upper spray arm 7, while the liquid line 15 is decoupled from the hydraulic circuit.

Der dem Umschaltelement 22 vorgelagerte Zusatzfilter 23 ist ein Teil eines insgesamt dreiteiligen Filtersystems der Geschirrspülmaschine, wie es in der Fig. 2 gezeigt ist. Das Filtersystem weist neben dem Zusatzfilter 23 noch einen Feinfilter 24 sowie einen Grobfilter 25 auf. Der Feinfilter 24 ist als ein, den Pumpentopf 11 überdeckendes Flächensieb, beispielsweise ein Lochblech, ausgebildet, das bündig mit dem Spülbehälterboden ausgerichtet ist. Der Grobfilter 25 ist als ein herkömmliches, herausnehmbares topfförmiges Grobsieb im Mittelbereich des trichterförmigen Feinfilters 24 vorgesehen. In dem dreiteiligen Filtersystem weist der Grobfilter 25 die größte Maschenweite auf, während der Feinfilter 24 mit geringerer Maschenweite ausgeführt ist. Der Zusatzfilter 23 ist demgegenüber ein Mikrofilter mit der geringsten Maschenweite.The additional filter 23 upstream of the switching element 22 is part of a total of three-part filter system of the dishwasher, as shown in the Fig. 2 is shown. In addition to the additional filter 23, the filter system also has a fine filter 24 and a coarse filter 25. The fine filter 24 is designed as a surface sieve covering the sump 11, for example a perforated plate, which is aligned flush with the sump bottom. The coarse filter 25 is provided as a conventional, removable cup-shaped coarse filter in the central region of the funnel-shaped fine filter 24. In the three-part filter system, the coarse filter 25 has the largest mesh size, while the fine filter 24 is designed with a smaller mesh size. The additional filter 23 is in contrast a microfilter with the smallest mesh size.

Wie aus der Fig. 2 hervorgeht, ist der Zusatzfilter 23 als ein flächiger Filtereinsatz in dem Gehäuse 26 des Verteilers 21 vorgesehen. Das Verteilergehäuse 26 ist hohlzylindrisch mit einer umlaufenden Seitenwand 27 sowie einer Deckwand 28 und einer gegenüberliegenden trichterförmig zulaufenden Bodenwand 29 ausgebildet. Im Mittelbereich der trichterförmig zulaufenden Bodenwand 29 ist ein Flüssigkeitsablauf mit einer Ableitung 30 angeschlossen. Die Ableitung 30 ist strömungstechnisch mit dem Pumpentopf 11 in Verbindung.Like from the Fig. 2 As can be seen, the additional filter 23 is provided as a flat filter insert in the housing 26 of the distributor 21. The distributor housing 26 is hollow cylindrical with a circumferential side wall 27 and a top wall 28 and an opposite funnel-shaped tapered bottom wall 29 is formed. In the central region of the funnel-shaped tapering bottom wall 29 is a liquid outlet with a discharge 30th connected. The discharge 30 is fluidically connected to the pump pot 11 in connection.

In der Deckwand 28 des Verteilers 21 sind Anschlussstutzen mit Auslassöffnungen 31, 32 für die zu den Sprüharmen 7, 9 führenden Flüssigkeitsleitungen 15, 16 vorgesehen. In der zylindrischen Seitenwand 27 ist demgegenüber eine Einlassöffnung 33 angeordnet, über die die Flüssigkeitsleitung 14 Spülflüssigkeit in den Verteilerinnenraum einspeisen kann. Im Verteilerinnenraum ist als Umschaltelement 22 eine drehbar an der Deckwand 28 gelagerte Verteilerscheibe 22 vorgesehen. Die Verteilerscheibe 22 befindet sich in der Fig. 2 beispielhaft in Gleitkontakt mit der Deckwand 28 und weist eine Steueröffnung 34 auf. Die Steueröffnung 34 kann in Abhängigkeit von der Drehposition der Verteilerscheibe 22 entweder die erste zum unteren Sprüharm 9 führende Auslassöffnung 31 oder die zweite zum oberen Sprüharm 7 führende Auslassöffnung 32 überlagern.In the top wall 28 of the manifold 21 connecting pieces are provided with outlet openings 31, 32 for the leading to the spray arms 7, 9 liquid lines 15, 16. In contrast, an inlet opening 33 is arranged in the cylindrical side wall 27, via which the liquid line 14 can feed rinsing liquid into the distributor interior. In the distributor interior is provided as a switching element 22 a rotatably mounted on the top wall 28 distributor plate 22. The distributor disc 22 is located in the Fig. 2 by way of example in sliding contact with the top wall 28 and has a control opening 34. Depending on the rotational position of the distributor disk 22, the control opening 34 can superimpose either the first outlet opening 31 leading to the lower spray arm 9 or the second outlet opening 32 leading to the upper spray arm 7.

Wie aus der Fig. 2 weiter hervorgeht, ist die Verteilerscheibe 22 topfförmig mit einem umlaufenden Seitenrand ausgebildet, an dessen unterem Ende der Zusatzfilter 23 befestigt ist. Der Zusatzfilter 23 ist hier ein ebenflächig ausgebildetes Mikrosieb. An dessen, der Spülflüssigkeitsströmung zugewandten Filteroberfläche ist ein Abschaber 38 vorgesehen, der drehfest an der Gehäuseseitenwand 27 gehaltert ist und in den Verteilerinnenraum einragt. Der Abschaber 38 ist mit seiner Schabkante in Anlage mit der Filteroberfläche, wodurch während einer Drehbetätigung der Verteilerscheibe 22 gegebenenfalls Filterrückstände von der Filteroberfläche abgetragen werden können. Die vom Zusatzfilter 23 ausgefilterten Filterrückstände sammeln sich im Mittelbereich des trichterförmigen Bodens 29. Von dort können die Filterrückstände über die Ableitung 30 aus dem Verteilergehäuse 26 geleitet werden, wie es später noch beschrieben ist.Like from the Fig. 2 is further apparent, the distributor plate 22 is cup-shaped with a peripheral side edge, at the lower end of the additional filter 23 is attached. The additional filter 23 is here a microsieve formed planar. At its, the Spülflüssigkeitsströmung facing filter surface, a scraper 38 is provided which is rotatably supported on the housing side wall 27 and protrudes into the distributor interior. The scraper 38 is with its scraping edge in contact with the filter surface, which may be removed during a rotary actuation of the distributor disc 22, if necessary, filter residues from the filter surface. The filter residues filtered out by the additional filter 23 accumulate in the middle region of the funnel-shaped bottom 29. From there, the filter residues can be conducted via the discharge line 30 out of the distributor housing 26, as will be described later.

Die Einlassöffnung 33 für die Spülflüssigkeit und der Abschaber 38 sind gegenüberliegend zueinander an der zylindrischen Gehäuseinnenwand 26 positioniert. Das Absetzen von Filterrückständen, die vom Abschaber 38 abgestreift werden und sich auf dem Boden 29 sammeln, wird daher nicht durch den eingeleiteten Spülflüssigkeitsstrom beeinträchtigt.The irrigation liquid inlet port 33 and the scraper 38 are positioned opposite to each other on the inner cylindrical inner wall 26. The settling of filter residues that are scraped off the scraper 38 and collect on the floor 29 is therefore not affected by the introduced rinsing liquid flow.

In der Fig. 3 ist ein zeitlicher Programmablauf mit den einzelnen Teilprogrammschritten eines Spülgangs der Geschirrspülmaschine gezeigt, nämlich dem Vorspülen V, Reinigen R, Zwischenspülen Z, Klarspülen K sowie Trocknen T. Der Programmablauf wird mittels einer in der Fig. 1 gezeigten Steuereinrichtung 35 gesteuert. Die Steuereinrichtung 35 ist unter anderem in Signalverbindung mit der Umwälzpumpe 13, der Laugenpumpe 19, dem Umschaltelement 22 sowie einem Magnetventil 36, das in der Ableitung 30 vom Verteilergehäuse 26 angeordnet ist.In the Fig. 3 is shown a temporal program sequence with the individual partial program steps of a wash cycle of the dishwasher, namely the pre-wash V, cleaning R, intermediate rinsing Z, rinsing K and drying T. The program flow is by means of one in the Fig. 1 shown control means 35 controlled. The control device 35 is inter alia in signal communication with the circulating pump 13, the drain pump 19, the switching element 22 and a solenoid valve 36 which is arranged in the discharge line 30 from the distributor housing 26.

Der Programmablauf wird mittels der elektrischen Steuereinrichtung 35 in üblicher Weise gesteuert. Während der Teilprogrammschritte mit Flüssigkeitseinsatz, also dem Vorspülen V, dem Reinigen R, dem Zwischenspülen Z und dem Klarspülen K schaltet die Steuereinrichtung 35 das als Verteilerscheibe gebildete Umschaltelement 22 in vorgegebenen Zeitintervallen um. Die beiden Sprüharme 7, 9 werden daher im Einzelbetrieb mit Spülflüssigkeit beaufschlagt. Zum Ende eines jeden Teilprogrammschrittes mit Flüssigkeitseinsatz setzt die Steuereinrichtung 42 die, Laugenpumpe 19 in Betrieb, um die verunreinigte Spülflüssigkeit aus dem Spülbehälter 1 in das Abwassersystem zu leiten. Gleichzeitig mit der Inbetriebnahme der Laugenpumpe 19 öffnet die Steuereinrichtung 35 das Magnetventil 36, wodurch auch die am Verteilergehäuse-Boden 29 angesammelten Filterrückstände über die Ableitung 30 und den Pumpentopf 11 in das Abwassersystem geleitet werden.The program sequence is controlled by the electrical control device 35 in a conventional manner. During the partial program steps with liquid insertion, that is to say the pre-wash V, the cleaning R, the intermediate rinsing Z and the rinsing K, the control device 35 switches over the switching element 22 formed as a distributor disk at predetermined time intervals. The two spray arms 7, 9 are therefore charged in individual operation with rinsing liquid. At the end of each partial program step with liquid insert, the control device 42 sets the drain pump 19 in operation in order to guide the contaminated flushing liquid from the washing container 1 into the sewage system. Simultaneously with the commissioning of the drain pump 19, the control device 35 opens the solenoid valve 36, whereby the accumulated on the distributor housing bottom 29 filter residues are passed through the discharge line 30 and the pump pot 11 in the sewer system.

In der Fig. 4 ist das Verteilergehäuse 26 gemäß dem zweiten Ausführungsbeispiel in Alleinstellung gezeigt. Das Verteilergehäuse 26 der Fig. 4 ist in einer Geschirrspülmaschine anwendbar, wie sie in der Fig. 1 gezeigt ist, auf deren Beschreibung Bezug genommen wird.In the Fig. 4 the distributor housing 26 according to the second embodiment is shown alone. The distributor housing 26 of the Fig. 4 is applicable in a dishwasher, as in the Fig. 1 is shown, to the description of which reference is made.

Im Unterschied zum Verteiler 21 der Fig. 1 und 2 ist der Zusatzfilter 23 gemäß der Fig. 4 nicht als ein ebenflächiges Mikrosieb gestaltet, sondern weist der Zusatzfilter 23 eine Reihe von scheibenförmigen Filtermitteln 37 auf, die auf einer Filtratsammelleitung 38 sitzen. Die Filtermittel 37 sind strömungstechnisch mit dem Hohlraum 39 der Filtratsammelleitung 38 in Verbindung. Die Filtratsammelleitung 38 ragt koaxial zu einer Mittelachse des hohlzylindrischen Verteilergehäuses 26 in dessen Innenraum hinein. Die scheibenförmigen Filtermittel 37 sitzen in Axialrichtung beabstandet voneinander auf der Leitung 38.In contrast to the distributor 21 of the Fig. 1 and 2 is the additional filter 23 according to the Fig. 4 not designed as a planar microsieve, but has the additional filter 23 a number of disc-shaped filter means 37 which sit on a Filtratsammelleitung 38. The filter means 37 are fluidically connected to the cavity 39 of the filtrate manifold 38 in connection. The filtrate manifold 38 protrudes coaxially with a center axis of the hollow cylindrical manifold housing 26 into the interior thereof. The disc-shaped filter means 37 sit in the axial direction spaced from each other on the line 38th

Zwischen den voneinander beabstandeten scheibenförmigen Filtermitteln 37 sind Ringräume 40 ausgebildet, die von der zu filtrierenden Spülflüssigkeit in einer kreisförmigen Querströmung durchströmt werden. Die Zulauföffnungen 33 für die Spülflüssigkeit in Radialrichtung geringfügig in die Ringräume 40 hineinragen. Um eine kreisförmige Querströmung in den Ringräumen 40 zu unterstützen, können die Zulauföffnungen 33 in tangentialer Richtung zu der zylindrischen Seitenwand 27 des Verteilergehäuses 26 ausgerichtet sein. Die sich auf den Filteroberflächen der scheibenförmigen Filtermittel 37 absetzenden Filterrückstände werden daher durch Zentrifugalwirkung zur zylindrischen Seitenwand 27 gedrängt und können dort entlang der zylindrischen Seitenwand 27 zum trichterförmigen Gehäuseboden 29 absinken. Hierzu sind die Außenumfangsränder der scheibenförmigen Filtermittel 37 über einen Ringspalt 41 von der Seitenwandung 27 beabstandet. Die sich auf dem Gehäuseboden 29 sammelnden Filterrückstände können über die Ableitung 30 zum Pumpentopf 11 rückgeführt werden, von wo sie mittels der Laugenpumpe 19 in das Abwassersystem geleitet werden.Between the spaced-apart disc-shaped filter means 37 annular spaces 40 are formed, which are flowed through by the rinsing liquid to be filtered in a circular cross-flow. The inlet openings 33 for the rinsing liquid in Radial direction slightly protrude into the annular spaces 40. In order to assist a circular cross-flow in the annular spaces 40, the inlet openings 33 may be aligned in the tangential direction to the cylindrical side wall 27 of the distributor housing 26. The settling on the filter surfaces of the disc-shaped filter means 37 filter residues are therefore urged by centrifugal action to the cylindrical side wall 27 and can there along the cylindrical side wall 27 to the funnel-shaped housing bottom 29 drop. For this purpose, the outer peripheral edges of the disc-shaped filter means 37 are spaced from the side wall 27 via an annular gap 41. The filter residues collecting on the housing bottom 29 can be returned via the discharge line 30 to the pumping pot 11, from where they are conducted into the sewage system by means of the drainage pump 19.

In den Ringräumen 40 im Verteilergehäuse 26 sind frei bewegbare Reinigungskörper 42 vorgesehen, die mit der kreisförmigen Querströmung der Spülflüssigkeit durch die Ringräume 40 bewegt werden. Die Reinigungskörper 42 unterstützen eine Abtragung von, die Filteroberflächen der Filtermittel 37 zusetzenden Rückstände.In the annular spaces 40 in the distributor housing 26 freely movable cleaning body 42 are provided, which are moved with the circular cross-flow of the washing liquid through the annular spaces 40. The cleaning bodies 42 assist in removing residues which add the filter surfaces 37 to the filter surfaces.

In der Fig. 5 ist in einer Ansicht von oben eine Verteilerscheibe 22 eines Verteilers 21 gemäß dem dritten Ausführungsbeispiel gezeigt. Der Verteiler 21 gemäß dem dritten Ausführungsbeispiel ist ebenfalls in der in der Fig. 1 gezeigten Geschirrspülmaschine anwendbar. Der Verteiler 21 entspricht darüber hinaus vom grundsätzlichen Aufbau dem in der Fig. 2 gezeigten Verteiler 21. So weist der Verteiler 21 gemäß dem dritten Ausführungsbeispiel das Verteilergehäuse 26 mit der Deckwand 28 auf, in der die beiden mit den Flüssigkeitsleitungen 15, 16 verbundenen Auslassöffnungen 31, 32 vorgesehen sind.In the Fig. 5 For example, in a view from above, a distributor disk 22 of a distributor 21 according to the third embodiment is shown. The distributor 21 according to the third embodiment is also in the in the Fig. 1 Dishwasher shown applicable. The distributor 21 also corresponds to the basic structure in the Fig. 2 Thus, the distributor 21 according to the third embodiment has the distributor housing 26 with the top wall 28, in which the two outlet openings 31, 32 connected to the liquid lines 15, 16 are provided.

Im Unterschied zur Fig. 2 ist in der im Verteilergehäuse 26 drehbar angeordneten Verteilerscheibe 22 nicht nur eine Steueröffnung vorgesehen. Vielmehr weist die Verteilerscheibe 22 für jede Auslassöffnung 31, 32 einen Steueröffnungs-Satz bestehend aus zwei Steueröffnungen 45, 46 auf. In den beiden Steueröffnungen 45, 46 des Steueröffnungs-Satzes sind jeweils Zusatzfilter 23 eingesetzt, die unterschiedliche Maschenweiten aufweisen.In contrast to Fig. 2 is not only a control port provided in the distributor housing 26 rotatably mounted distribution disc 22. Rather, the distributor disc 22 for each outlet opening 31, 32 on a control opening set consisting of two control ports 45, 46. In the two control ports 45, 46 of the control opening set each additional filter 23 are used, which have different mesh sizes.

Im Unterschied zu den vorangegangenen Ausführungsbeispielen sind daher je nach Drehposition der Verteilerscheibe 22 Zusatzfilter 23 unterschiedlicher Maschenweiten in den Hydraulikkreislauf der Geschirrspülmaschine zuschaltbar bzw. von dem Hydraulikkreislauf entkoppelbar. Mit Bezug auf den in der Fig. 3 veranschaulichten Spülgang der Geschirrspülmaschine kann während des Vorspülens V und des Reinigens R die Steueröffnung 46 mit dem grobmaschigen Zusatzfilter 23 je nach Drehstellung der Verteilerscheibe 22 die beiden Auslassöffnungen 31, 21 im Wechselbetrieb freigeben. Während des Vorspülens V und des Reinigens R erfolgt daher nur eine ausreichende Grobfiltration der Spülflüssigkeit. Die beiden Steueröffnungen 45 mit den feinmaschigen Zusatzfiltern 23 sind demgegenüber vom Hydraulikkreislauf entkoppelt.In contrast to the previous embodiments, therefore, depending on the rotational position of the distributor disc 22 additional filter 23 different mesh sizes in the hydraulic circuit of the dishwasher switchable or decoupled from the hydraulic circuit. With reference to in the Fig. 3 illustrated rinse cycle of the dishwasher can during the pre-rinse V and cleaning R the control port 46 with the coarse-mesh additional filter 23 depending on the rotational position of the distributor disc 22, the two outlet ports 31, 21 release in alternate operation. During the pre-rinsing V and the cleaning R, therefore, only a sufficient coarse filtration of the rinsing liquid takes place. In contrast, the two control openings 45 with the fine-meshed additional filters 23 are decoupled from the hydraulic circuit.

Beim nachfolgenden Zwischenspülen Z oder Klarspülen K wird anstelle der Steueröffnung 46 die Steueröffnung 45 mit dem feinmaschigen Zusatzfilter 23 in den Strömungsquerschnitt der beiden Auslassöffnungen 31, 32 gefahren. Gemäß der Fig. 5 sind die Zusatzfilter 23 jeweils Siebeinsätze, die sich bündig innerhalb der Steueröffnungen 45, 46 erstrecken.In the subsequent intermediate flushing Z or rinsing K, instead of the control opening 46, the control opening 45 with the fine-meshed additional filter 23 is moved into the flow cross-section of the two outlet openings 31, 32. According to the Fig. 5 the additional filters 23 are each sieve inserts which extend flush within the control openings 45, 46.

In der Fig. 6 ist in einer, der Fig. 2 entsprechenden vergrößerten Seitenansicht der Verteiler 21 gemäß dem vierten Ausführungsbeispiel gezeigt, der vom grundsätzlichen Aufbau dem Verteiler 21 der Fig. 2 entspricht, so dass bezüglich seines Aufbaus und seiner Funktionsweise auf die Beschreibung der Fig. 2 zurückgegriffen werden kann. Im Unterschied zur Fig. 2 weist der Zusatzfilter 23 zwei übereinander angeordnete Sieblagen 48, 49 mit jeweils vorgegebener Maschenweite auf, die in Gleitkontakt aufeinander liegen. Die beiden Sieblagen 48, 49 sind randseitig in einem nur grob angedeuteten ringförmigen Getriebeelement 50 eingefasst. Das Getriebeelement 50 ist mittels der Steuereinrichtung 35 derart ansteuerbar, dass sich die beiden Sieblagen 48, 49 zueinander verstellen können, wodurch die Gesamtmaschenweite des Zusatzfilters 23 vergrößerbar bzw. reduzierbar ist. Die Sieblagen 48, 49 können übereinander liegende Lochbleche sein, die mit ihrer jeweiligen Teilmaschenweite die einstellbare Gesamtmaschenweite des Zusatzfilters 23 ergibt. Der, dem Spülflüssigkeitsstrom zugewandten Filteroberfläche des Zusatzfilters 23 ist, wie auch bereits im Ausführungsbeispiel der Fig. 2 gezeigt, der Abschaber 34 zugeordnet, der die Filteroberfläche zur Entfernung von Filterrückständen abstreift.In the Fig. 6 is in one who Fig. 2 corresponding enlarged side view of the distributor 21 according to the fourth embodiment shown, the basic structure of the distributor 21 of the Fig. 2 so that in terms of its structure and its operation on the description of Fig. 2 can be used. In contrast to Fig. 2 has the additional filter 23 two superposed Sieblagen 48, 49, each with a predetermined mesh size, which are in sliding contact with each other. The two screen layers 48, 49 are bordered in an only roughly indicated annular gear element 50. The transmission element 50 can be controlled by means of the control device 35 such that the two screen layers 48, 49 can be adjusted relative to each other, whereby the overall mesh width of the additional filter 23 can be increased or reduced. The screen layers 48, 49 may be perforated plates lying one on top of the other which, with their respective partial mesh width, gives the total adjustable mesh width of the additional filter 23. The, the Spülflüssigkeitsstrom facing filter surface of the additional filter 23, as already in the embodiment of Fig. 2 shown associated with the scraper 34, which strips the filter surface to remove filter residues.

In den folgenden Fig. 7 und 8 ist ein Verteiler 21 gemäß dem fünften Ausführungsbeispiel in unterschiedlichen Betriebszuständen dargestellt. Der in der Fig. 7 gezeigte Verteiler 21 ist bezüglich seiner Funktionsweise und seinem Aufbau grundsätzlich identisch mit dem Verteiler der Fig. 2. Im Unterschied zur Fig. 2 ist die Einlassöffnung 33 für Spülflüssigkeit nicht in der Seitenwandung 27 des Verteilergehäuses 26 angeordnet, sondern befindet diese sich in der Deckwand 28, und zwar gemeinsam mit den beiden Auslassöffnungen 31, 32 zu den Flüssigkeitsleitungen 15, 16. Im Bodenbereich 29 weist das Verteilergehäuse 26 ebenfalls eine Auslassöffnung mit angeschlossener Ableitung 30 auf, durch die Filterrückstände aus dem Filtergehäuse 26 ableitbar sind.In the following FIGS. 7 and 8 a distributor 21 according to the fifth embodiment is shown in different operating states. The Indian Fig. 7 shown distributor 21 is basically identical with respect to its operation and structure Distributor of Fig. 2 , In contrast to Fig. 2 If the irrigation fluid inlet opening 33 is not arranged in the side wall 27 of the distributor housing 26, it is located in the top wall 28, together with the two outlet openings 31, 32 to the liquid lines 15, 16. In the bottom area 29, the distributor housing 26 also has an outlet opening with a connected discharge line 30 through which filter residues from the filter housing 26 can be derived.

Wie aus der Fig. 7 weiter hervorgeht, weist die Verteilerscheibe 22 einerseits die Steueröffnung 34 und andererseits die zusätzliche Durchlassöffnung 53 auf, durch die Spülflüssigkeit in das Verteilergehäuseinnere einströmbar ist. Gemäß der Fig. 7 ist der Zusatzfilter 23 als ein Siebeinsatz innerhalb der Steueröffnung 34 angeordnet.Like from the Fig. 7 further shows, the distributor plate 22 on the one hand, the control port 34 and on the other hand, the additional passage opening 53, is flowed through the rinsing liquid into the distributor housing interior. According to the Fig. 7 the additional filter 23 is arranged as a sieve insert within the control opening 34.

In der Fig. 7 ist die Verteilerscheibe 22 in einer während eines Teilprogrammschrittes mit Flüssigkeitseinsatz vorgesehenen Schaltstellung gezeigt, in der Spülflüssigkeit von der Umwälzpumpe 13 über die Einlassöffnung 33 und die Durchlassöffnung 53 in das Verteilergehäuseinnere geführt wird und von dort über den Zusatzfilter 23 durch die Auslassöffnung 31 ausströmt. Um einen störungsfreien Wechselbetrieb zu gewährleisten, ist die Durchlassöffnung 53 wie ein Langloch dimensioniert, sodass auch bei einer Überlagerung der Steueröffnung 34 mit der benachbarten Auslauföffnung 32 die Spülflüssigkeit durch die Durchlassöffnung 53 in das Verteilergehäuseinnere strömen kann.In the Fig. 7 the distributor disc 22 is shown in a switching position provided with a fluid insert during a partial program step in which rinsing fluid is conducted from the circulating pump 13 via the inlet opening 33 and the passage opening 53 into the distributor housing interior and from there via the additional filter 23 through the outlet opening 31. In order to ensure a trouble-free alternating operation, the passage opening 53 is dimensioned like a slot, so that even with a superimposition of the control opening 34 with the adjacent outlet opening 32, the rinsing liquid can flow through the passage opening 53 into the distributor housing interior.

Im Gegensatz zur Fig. 7 ist in der Fig. 8 der Verteiler 21 in einer Selbstreinigungsbetriebsart gezeigt. In dieser Betriebsart ist die Verteilerscheibe 22 in eine Drehposition gebracht, in der die Steueröffnung 34 die Einlassöffnung 33 für die Spülflüssigkeit überlagert. Bei Betätigung der Umwälzpumpe 13 kann nunmehr die Spülflüssigkeit in einer Rückspül-Richtung den Zusatzfilter 23 durchströmen. Dadurch werden Filterrückstände von der Filteroberfläche des Zusatzfilters 23 abgetragen. Um die Filterrückstände aus dem Verteilergehäuse 26 abzuführen, kann die Steuereinrichtung 35 sowohl die Laugenpumpe 19 einschalten als auch das Magnetventil 36 in der Ableitung 30 öffnen, wodurch die Filterrückstände aus dem Verteilergehäuse in das Abwassersystem geleitet werden können.In contrast to Fig. 7 is in the Fig. 8 the distributor 21 is shown in a self-cleaning mode. In this mode, the distribution disc 22 is brought into a rotational position in which the control port 34 superimposed on the inlet opening 33 for the rinsing liquid. Upon actuation of the circulation pump 13, the rinsing liquid can now flow through the additional filter 23 in a backwashing direction. As a result, filter residues are removed from the filter surface of the additional filter 23. In order to remove the filter residues from the distributor housing 26, the control device 35 can both turn on the drain pump 19 and also open the solenoid valve 36 in the drain 30, whereby the filter residues can be conducted from the distributor housing into the sewage system.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Spülbehälterrinse tank
33
Geschirrkorbdish rack
55
Geschirrkorbdish rack
77
Sprüharmspray arm
99
Sprüharmspray arm
1111
Pumpentopfsump
1313
Umwälzpumpecirculating pump
1414
Flüssigkeitsleitungliquid line
1515
Flüssigkeitsleitungliquid line
1616
Flüssigkeitsleitungliquid line
1717
FrischwasserzuleitungFresh water supply
1818
Ablaufleitungdrain line
1919
LaugenpumpeDrain pump
2121
Verteilerdistributor
2222
Umschaltelementswitching
2323
Zusatzfilteradditional filters
2424
Feinfilterfine filter
2525
Grobfiltercoarse filter
2626
Verteilergehäusedistributor housing
2727
Seitenwandungsidewall
2828
Deckwandtop wall
2929
Verteilergehäuse-BodenDistributor housing bottom
3030
Ableitungderivation
3131
Auslassöffnungoutlet
3232
Auslassöffnungoutlet
3333
Einlassöffnunginlet port
3434
Steueröffnungcontrol port
3535
Steuereinrichtungcontrol device
3636
Magnetventilmagnetic valve
3737
Filtermittelfilter media
3838
DurchlassöffnungPort
4040
Ringräumeannular spaces
4242
Reinigungskörpercleaning body
4545
Steueröffnungencontrol openings
4646
Steueröffnungencontrol openings
4848
Sieblagescreen layer
4949
Sieblagescreen layer
5050
Getriebeelementgear element
5353
DurchlassöffnungPort
VV
Vorspülenprewash
RR
ReinigenClean
ZZ
Zwischenspülenintermediate rinse
KK
KlarspülenRinse
TT
Trocknendry

Claims (33)

  1. Dishwasher with liquid ducts (14, 15, 16), which conduct rinsing liquid to spray devices (7, 9) arranged in a rinsing container (1), and with a changeover element (22), on the actuation of which the rinsing liquid can be conducted to a first liquid duct (15), which leads to the first spray device (3), and/or to a second liquid duct (16), which leads to the second spray device (5), characterised in that at least one auxiliary filter (23) is associated with the changeover element (22) and that the changeover element (22) together with the auxiliary filter (23) are arranged in a common distributor housing (26).
  2. Dishwasher according to claim 1, characterised in that the changeover element (22) and the at least one auxiliary filter (23) are combined into one component.
  3. Dishwasher according to claim 1 or 2, characterised in that the auxiliary filter (23) is coupled in terms of movement with the changeover element (22).
  4. Dishwasher according to claim 1, 2 or 3, characterised in that the auxiliary filter (23) is arranged at the pressure side of a circulating pump (13) circulating the rinsing liquid.
  5. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) is mounted upstream of the changeover element (22) in the liquid flow direction.
  6. Dishwasher according to any one of the preceding claims, characterised in that a scraper (38) which strips filter residues from the filter surface flowed against by the rinsing liquid is associated with the auxiliary filter (23).
  7. Dishwasher according to claim 6, characterised in that the scraper (38) is stationary relative to the auxiliary filter (23).
  8. Dishwasher according to any one of the preceding claims, characterised in that the changeover element (22) is a rotatably mounted distributor disc with at least one control opening (34), which is preferably opposite a rotationally fixed distributor wall (28) with at least one outlet opening (31, 32) to the first and/or second liquid duct (15, 16).
  9. Dishwasher according to any one of the preceding claims, characterised in that the distributor wall (28) is a top wall of the distributor housing (26).
  10. Dishwasher according to any one of the preceding claims, characterised in that the distributor housing (26) has a base wall (29) with a drain (30) for filter residues.
  11. Dishwasher according to any one of the preceding claims, characterised in that the distributor housing (26) has a side wall (27) with at least one inlet opening (23) through which the rinsing liquid can be conducted into the distributor housing (26).
  12. Dishwasher according to claims 6 and 11 or claims 7 and 11, characterised in that the scraper (38) is arranged at a side of the distributor housing (26) opposite the inlet opening (33).
  13. Dishwasher according to any one of the preceding claims, characterised in that the changeover element (22) in a first switch setting frees the first liquid duct (15) and blocks the second liquid duct (16) and in a second switch setting blocks the first liquid duct (15) and frees the second liquid duct (16).
  14. Dishwasher according to any one of the preceding claims, characterised in that provided at the rinsing container base are a coarse filter (24) and a fine filter (25) which by comparison with the auxiliary filter (23) have a greater mesh width.
  15. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) is self-cleaning.
  16. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) comprises at least one disc-shaped filter means (37) which is seated on a filtrate collecting duct (38).
  17. Dishwasher according to claim 16, characterised in that the filtrate collecting duct (38) is connected in terms of flow with the control opening (34) of the distributor element (22).
  18. Dishwasher according to one of claims 16 and 17, characterised in that at least one annular space (40), which can be flowed through by the rinsing liquid, is formed between the filter means (37) and/or housing walls.
  19. Dishwasher according to claim 18, characterised in that at least one, preferably freely movable cleaning body (42), which assists removal of filter residues deposited on the filter surface, is arranged in the annular space (40).
  20. Dishwasher according to any one of the preceding claims, characterised in that the distributor housing (26) is of hollow-cylindrical form.
  21. Dishwasher according to any one of claims 17 to 20, characterised in that an annular gap (41) by way of which filter residues can be deposited on the base (29) of the distributor housing (26) is provided between the filter means (37) and the side wall (27) of the distributor housing (26).
  22. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) comprises at least one first individual filter and second individual filter, which have different mesh widths.
  23. Dishwasher according to claim 22, characterised in that the individual filters of the auxiliary filter (23) can be coupled to or decoupled from a hydraulic circuit of the dishwasher by means of an electronic control device (35).
  24. Dishwasher according to claim 23, characterised in that the individual filters can be coupled or decoupled in dependence on the respective part program step (R, K) of a rinsing process.
  25. Dishwasher according to one of claims 23 and 24, characterised in that the distributor disc (22) has at least one first control opening (45) with associated first auxiliary filter (23) and at least one second control opening (46) with associated second auxiliary filter (23).
  26. Dishwasher according to claim 25, characterised in that in a first part program step (R) with a liquid charge the distributor disc (22) frees, by its first control opening (45), the first or the second liquid duct (15, 16) and in a second part program step (K) with a liquid charge the distributor disc (22) frees, by its second control opening (46), the first or the second liquid duct (15, 16).
  27. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) comprises at least two sieve layers (48, 49), which are arranged one above the other and which are adjustable relative to one another in their respective plane for setting of the mesh width of the auxiliary filter (23).
  28. Dishwasher according to claim 27, characterised in that at least one of the two sieve layers (48, 49) of the auxiliary filter (23) is adjustable by way of a transmission element (50) by a control device (35).
  29. Dishwasher according to any one of claims 8 to 28, characterised in that the auxiliary filter (23) is arranged, as a filter insert, within the control opening (34; 45, 46) of the distributor element (22).
  30. Dishwasher according to any one of the preceding claims, characterised in that the auxiliary filter (23) during a part program step with a liquid charge can be flowed through by the rinsing liquid in a first flow direction.
  31. Dishwasher according to claim 30, characterised in that in the self-cleaning mode of operation the control opening (34) of the distributor element (22) is superimposed on the rinsing liquid inlet opening (33).
  32. Dishwasher according to claim 30 or 31, characterised in that the outlet openings (31, 32) to the first and second liquid ducts (15, 16) as well as the inlet opening (33) for the rinsing liquid are arranged together in the distributor wall (28).
  33. Dishwasher according to claim 22, characterised in that the distributor element (22) has a passage opening (53) which during the part program step with a liquid charge is superimposed on the inlet opening (33) for the rinsing liquid.
EP08861686A 2007-12-14 2008-11-20 Dishwasher Active EP2222218B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08861686T PL2222218T3 (en) 2007-12-14 2008-11-20 Dishwasher

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060196A DE102007060196A1 (en) 2007-12-14 2007-12-14 dishwasher
PCT/EP2008/065886 WO2009077286A1 (en) 2007-12-14 2008-11-20 Dishwasher

Publications (2)

Publication Number Publication Date
EP2222218A1 EP2222218A1 (en) 2010-09-01
EP2222218B1 true EP2222218B1 (en) 2011-06-01

Family

ID=40345025

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08861686A Active EP2222218B1 (en) 2007-12-14 2008-11-20 Dishwasher

Country Status (8)

Country Link
US (1) US9138123B2 (en)
EP (1) EP2222218B1 (en)
CN (1) CN101902948B (en)
AT (1) ATE511381T1 (en)
DE (1) DE102007060196A1 (en)
ES (1) ES2365036T3 (en)
PL (1) PL2222218T3 (en)
WO (1) WO2009077286A1 (en)

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Also Published As

Publication number Publication date
PL2222218T3 (en) 2011-10-31
DE102007060196A1 (en) 2009-06-18
WO2009077286A1 (en) 2009-06-25
US9138123B2 (en) 2015-09-22
US20110056527A1 (en) 2011-03-10
CN101902948B (en) 2012-02-22
ATE511381T1 (en) 2011-06-15
EP2222218A1 (en) 2010-09-01
ES2365036T3 (en) 2011-09-20
CN101902948A (en) 2010-12-01

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